An İstanbul court has ruled for the arrest of thirty lawyers as part of an investigation into the Gülen movement, state-run Anadolu news agency reported on Wednesday.

With the ruling, total number of imprisoned lawyers across Turkey reached to 400.

Last week, the İstanbul Chief Public Prosecutor’s Office issued detention warrants for 84 lawyers over their alleged use of a smart phone application known as ByLock, which is considered by Turkish authorities to be the top communication tool among followers of the Gülen movement.

The movement is accused by the government of masterminding a failed coup attempt on July 15, 2016. Gülenists deny any involvement.

Thirty-eight of the lawyers were detained, of whom 30 were arrested on Wednesday, while eight of them were released on judicial probation.

One of the lawyers under arrest was claimed to be the lawyer of Meral Akşener, a politician who was expelled from the Nationalist Movement Party (MHP) due to her bid to oust the incumbent chairman.

But Akşener denied the news later in the day.

At least 400 lawyers have been sent to prison, while 997 others have been investigated either over alleged involvement in a coup attempt on July 15, or having links to the Gülen movement.

The data was compiled by Turkey Purge editors based on reports released by Turkey’s state-run Anadolu news agency and the @ Av_EvrenSEL Twitter account, an initiative for the arrested Turkish lawyers, since the failed coup attempt.